Cooking apparatus and method of manufacturing the same

Abstract

A cooking apparatus is disclosed. The cooking apparatus includes an apparatus body, a cooking chamber defined in the apparatus body for cooking food, and a door for opening and closing the cooking chamber. The cooking chamber has an inner wall surface-treated by plasma.

The invention claimed is: 
     
       1. A cooking apparatus, comprising:
 a body; 
 a cooking chamber formed in the body, the cooking chamber having an inner surface; 
 a door for opening and closing the cooking chamber; 
 a base material comprising a metal and forming an exterior of the cooking chamber; 
 a first coating material comprising an enamel coated on the base material to form a first coating; 
 a plurality of etched grooves formed on the first coating; and 
 a second coating material exhibiting water repellency applied into the etched grooves to fill the etched grooves and solidified by heating to form a second coating, 
 wherein both the first coating and the second coating simultaneously form the inner surface of the cooking chamber and are simultaneously exposed to food on the inner surface, thereby increasing abrasion resistance by the first coating and cleanability by the second coating. 
 
     
     
       2. The cooking apparatus of  claim 1 , wherein the etched grooves are formed by plasma etching. 
     
     
       3. The cooking apparatus of  claim 1 , wherein the second coating material comprises silicone oil. 
     
     
       4. The cooking apparatus of  claim 1 , further comprising:
 a tray, the tray having an upper surface; 
 etched grooves formed in the upper surface of the tray by plasma etching; and 
 the first or second coating material applied to the upper surface of the tray. 
 
     
     
       5. The cooking apparatus of  claim 1 , further comprising a moisture supply unit for supplying steam or water necessary to clean the inner surface of the cooking chamber after the cooking of the food is completed. 
     
     
       6. The cooking apparatus of  claim 1 , wherein the first coating has a first predetermined thickness, and
 wherein the etched grooves are formed in a regular pattern and have a first predetermined depth, the first predetermined depth being less than the first predetermined thickness.